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JAMB Physics 1981 Question 26

Question 26

Refraction of Light

The absolute refractive indices of glass and water are 3/2 and 4/3 respectively. The refractive index at the interface when a ray travels from water to glass is

  1. A.1/2
  2. B.8/9
  3. C.9/8
  4. D.17/12
  5. E.2
Show the answer and explanation

Answer: C (9/8)

Explanation

wng = nglass/nwater = (3/2) ÷ (4/3) = 9/8.